Pen



FIG. 1 is a rear elevational view;

FIG. 2 is a right side elevational view;

FIG. 3 is a front elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a side elevational view of the pen body with the cap member removed for ease of illustration;

FIG. 6 is a front elevational view of the pen body with the cap member removed for ease of illustration;

FIG. 7 is a bottom plan view; and,

FIG. 8 is a top plan view thereof. 

The ornamental design for a pen, as shown and described. 